Seam for woven-wire fabric



Dec. 26, 1922. 1,440,159

H. LINDSAY. SEAM FOR WOVEN WIRE FABRIc. FILED MAR. 13, I922.

Patented Dec. 26, i922. I

, iaiaiae nararnron LINDSAY, or cnnvntann, onmnssie-non so an]; LInnsAYw-Inn WEAVING cor/many, or cnnvnnnnn, OHIO, .aconneaa'rronon OHIO.

SEAEIFOR 'WOVEN WIRE FABRIC.

Application filed March 13, 1922. Serial. I To..5 l3,2,4=7.

method of j oining the ends of a wire fabric to form an endless belt. Thebelt so formed,

which is particularly useful in llourdrinier paper machines, is also comprehended within my invention.

One of the difhculties encountered 1n lacing the ends of wire cloth so as toform an endless belt, has been the attalnment of a whichrpossesses substantially the same construction as the remaining part of the cloth. Some forms of seam have embodied diagonal stitch which fills up the interstices, thus rendering it diflicult for water'to pass throughthe seam when the belt is inuse, As a result the paper is weakened, on a line transversely thereof, each time the seam en.-

the pulp as it passes across the suction box.

Still another form of scam is embodied in a diagonal stitch which extends over two weft wires at each end of the belt and diagonally from one end across the joint to the other end, and then back and forth across the fabric. In practice, this lacing is accomplished when the two end portions of the fabric are placed. one on top of the other with the extreme end aligning, and when such belt is unfolded the space between the severed warp threads is larger than the interstices of the fabric. This allows too much,

water to pass through the belt with a resultant detrimental effect upon the paper.

. In order, therefore, to overcome the objectionable features above set forth, my invention provides a method of joining the ends of wire cloth, so as to form a belt wherein the seam forms a mesh substantially the same as exists in the woven cloth. In addition, my invention contemplates the con struction of a seam wherein sufficient space v is provided for water to pass through the belt so as not to weaken that portion of the paper, formed by the pulp adjacent the seam.

This invention relates particularly to a The means for carrying out my invention will be fully set forth, in the following description, which pertains to the drawings, a i

and essential features will be summarized in the claims.

In the drawings, Fig. 1 is a plan view of a portion of a finished belt having a seam made in accordance with my invention;

is a diagrammatic view showing the ends of the belt foldechone upon the other and indicatinn'a method of lacing: the ends- 65,

together; Figs. 3, 4 and 5 areend views of v the folded belt indicating various steps in the method of forming the seam; andhig. 6 s an end view showing the belt open.

Myinvention isc'oncerned with a method of. forming a seam which is particularly adapted for wire belts which are usedyln the process of paper manufacture. Accord ingly, in the embodiment shown,the' ends of thefabric are indicated at A and Brand as 7 bein joined together with a binding thread bin-wire C. During, the lacing operation, a filler thread or wire D is lald along the adjacent edges and is held thereagainstbv the bindingthread G. Then when the :belt opened up, the filler lies intermediate the severed warp threads, as indicated in Figs. 1 and 6. e

The varlous'steps in forming the seam is diagrammatically indicated in Figs. 2 to 5,

wherein the end A is laid over the end B, sothat the severed warp threads adjacent the respective ends are in substantially the same plane; then the filler D is laid along the edges and sewed thereagainst by the binding thread C. in forming the seam, a customary spacing instrument E is inserted beneath the bights Fwhich extend around the filler and is moved along the seam during the lacing operation, thusleaving a space as 9 As illustrative of the method of lacing, i

Fig. 3 shows the ends of the cloth in abut ting engagement; Fig. l shows the filler and binding lacing instrument beneath the thread; and Fig. 5 shows the filler in tion with the instrument removed.

indicated in Fig. 6, and the seam is then ironed flat.

her the seam is formed the beltis opened as the paper formed by the across the belt is of llIllfOI'Hlquality. In ad: 7

By employing a filler threaitl' intermediate the ends of the belt the mesh of the cloth is maintained substantially uniform across the seam, and as a result,

pulp moving dition, the filler permits the use of a diag-' onal stitch which has been found to with stand the Wear occasioned by the movement thereof across the suction "boxes of oiirdrinier machine. "This type oi stitching leaves-theniesh ot' the belt-on the adjacent sea n comparatively open,tl1us allowing the uniform passage 'ofwvater throughthe belt and insuring a uniform quality of paper Having thus described my invention, I

7 claim 1'. A method' of forming a seam on Woven fabric-comprising bringingthe ends of the fabri'c together, laying, a tiller thread adjacent the ends-and substantially, inthe same plane thereof and then lacing the fillerto" the ends ofthe web. I

- 2. The method of forming a seam on a woven belt comprising bringing the v ends of the severed Warp threadsadjacent each other, placing a fillenthread transversely of the warpthreads and then lacing the filler in such manner that when the ends are opened and the cloth laid flat the tiller' lies interinediate the severed warp threads and substantially in the same plane as the Weft threads. 3.YA method of forming aseam on'a WOVGII Wire belt comprising 'brin ing the ends together so that thesevered Warp Wires I lie one above the other placing afiller Wire in abuttingengagement With the severed ing in combination, a filler Wire ends of the War Wl'IQSHIflCl then lacing the fillerfwire to the endsot the Web.

tiller Wire intermediate the severed warp Wires tobe laced, whereby the mesh of the cloth adjacent the seam is substantially the same as theniesh of the fabric.

5. A seam :ii'or Woven Wire belts compris- 1 extending transversely of the belt, andabinding Wire extending over and under said filler and through the ends to be joined.

6. ilt seillll iiol woven belts comprising in combination :1 tiller thread in abutting engageinent'with the severed Warp threads to be joined, and a;;binding thread which eX- tends' diagonally between the ends to be joined and" on both sides of the filler thread. 7. A seainfor woven belts comprising in combinationafbinding thread which extends diagonally from. one side of a seam to the other side thereof,v and a filler thread extending transversely of the belt, said filler HAMILTON LINDSAY 7 4O 4:. The method for making a seen] for v i Woven Wire belts comprising the placing of a 

